Electrolytic rectifier



Nov. 1, 1927. 1,647,650

w. MORRISON l ELECTROLYTIC RECTIFIER Filed Oct. 15, 1925 .lllntenterl Nov. ll, litigi?.

lltlllitt@ WELLIAM MORRISON'. OF CHICAGO, ILLINOIS; MIARGRET MORRISON ADMNISTRA- TREK 'OF SAID WlLLlAB/ MORRISON, DECIEASED.

ELECTROLYTIC REOTIFIER.

Application tiled October 15, 1925. Serial No. 62,661.

My invention relates to an electrolytic rectilier particularly adapted for use in connection with a source ot alternating current for furnishing unidirectional current to the 5 elements of tubes used in radio work and lor charging storage batteries.

its the ilming electrode l may use metallic niobium or tentaluim'and as the non-.tilinelectrode l use lead, platinum, or any lo other non-filming Imetal not materially zittoclted by the electrolyte, or carbon.

For the electrolyte l use a solution of the sulfate-of thorium or cerium or other rare motel, or a mixture of s'uch sulfatos. `@ne l5 such mixture can readily be obtained by dissolving misch-metall7 (the mixture of cerium metals obtained from monazite santi) in sulfuric acid and evaporating the solution to dryness. The sulfatos so obtained are then dissolved in Water.

l have found that a rectitier so constructed is capable ot use with a very high dierence of potential.

lhe tilm formed on the niobium or tantalum plate when operated With the solutions above described is very permanent and unusually resistant to the passage olf` current from the filming electrode, but permits flow ot` current from the non-iilming electrode to the plate.

l prefer to use the sulfate salts but the stilts of other oxygen-containing inorganic acids, such as nitric acid, may be used.

lbe accompanying drawing illustrates the described rectitier, the tigure being a transverse vertical section through the cell and electrolyte, the electroclebeing shown in elevation.

l. An electrolytic rectifier having an electrode of material selected from the group consisting of niobium and tantelum and an electrode of a non-filming .conductor in an electrolyte comprising e sulfate ot a rare metal.

Q. An electrolytic rectifier having an electrode of material selected from the group consisting ot' niobinm and tantzilum, and an electrode of a non-lming conductor in an electrolyte comprising a mixture of sul'letes Y" ot the rare metals.

3. n electrolytic rectifier as claimed in claim l in which the electrolyte is thorium sulfate.

4. In en electrolytic rectifier having a lming electrode and a non-filming electrode7 an electrolyte comprising e. sulfate of a rare metal.

, 5. In an clectrolytic rectifier having a filming electrode and a nonotilming elect-rode, an electrolyte comprising a mixture oi .sulfates of the rare metals.

6. ln an electrolytic rectiiier having a. filming electrode and a non-filming electrode, an electrolyte of thorium sulfate.

7. In an electrolytic rectifier, having a filming electrode and a non-iilming electrode, an electrolyte comprising an inorganic acid oxygen salt ot a rare metal.`

8.111 an electrolytic rectier having a' filming electrode and a non-Filming electrode, an electrolyte comprising a thorium salt of an oxygen-containing inorganic acid.

9. In an electrolytic rectifier having a-tilming electrode and a non-filming electrode, an electrolyte comprising an oxygen-containing inorganic acid salt of a rare metal of the lett-hand column of Group lV of Mendelejetfs Periodic System ot the Elements.

l0. in an electrolytic rectifier having a filming electrode and ar non-filming electrode, an lelectrolyte comprising a sulfate of a rare metal of the lett-hand column of Group IV of Mendelejetfs Periodic System of the Elements. y

In testimony whereof, I affix my signature.

WlLLlAll/l MORRISON. 

